86940831 has 4 divisors (see below), whose sum is σ = 115921112. Its totient is φ = 57960552.

The previous prime is 86940781. The next prime is 86940881. The reversal of 86940831 is 13804968.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (86940781) and next prime (86940881).

It is not a de Polignac number, because 86940831 - 2⁶ = 86940767 is a prime.

It is a super-2 number, since 2×86940831² = 15117416189941122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86940831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86940881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14490136 + ... + 14490141.

It is an arithmetic number, because the mean of its divisors is an integer number (28980278).

Almost surely, 2^86940831 is an apocalyptic number.

86940831 is a deficient number, since it is larger than the sum of its proper divisors (28980281).

86940831 is a wasteful number, since it uses less digits than its factorization.

86940831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28980280.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 86940831 is about 9324.2067222901. The cubic root of 86940831 is about 443.0042870292.

The spelling of 86940831 in words is "eighty-six million, nine hundred forty thousand, eight hundred thirty-one".